Mind is the abstract level of our shared being. It is the home of ideas which can be shared but in sharing are not lost (unlike if we share money or cookies, say). Mind is not synonymous with the brain, which is part of the body. Nor is mind the activity of the brain, what the brain does. Mind is closer in nature to awareness or consciousness. It does not easily conform to our understanding of time and space (e.g., the sharing example above). Although ACIM‘s use of mind is close to Platonic and Gnostic traditions, it is also where the course’s connections to Eastern religious ideas (especially with respect to nonduality) are most obvious.